/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:39:14,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:39:14,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:39:14,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:39:14,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:39:14,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:39:14,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:39:14,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:39:14,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:39:14,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:39:14,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:39:14,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:39:14,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:39:14,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:39:14,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:39:14,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:39:14,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:39:14,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:39:14,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:39:14,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:39:14,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:39:14,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:39:14,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:39:14,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:39:14,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:39:14,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:39:14,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:39:14,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:39:14,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:39:14,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:39:14,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:39:14,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:39:14,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:39:14,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:39:14,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:39:14,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:39:14,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:39:14,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:39:14,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:39:14,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:39:14,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:39:14,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:39:14,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:39:14,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:39:14,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:39:14,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:39:14,361 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:39:14,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:39:14,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:39:14,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:39:14,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:39:14,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:39:14,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:39:14,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:39:14,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:39:14,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:39:14,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:39:14,366 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:39:14,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:39:14,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:39:14,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:39:14,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:39:14,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:39:14,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:39:14,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:39:14,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:39:14,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:39:14,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:39:14,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:39:14,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:39:14,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:39:14,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:39:14,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:39:14,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:39:14,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:39:14,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:39:14,708 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:39:14,709 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2020-10-14 05:39:14,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee90195cb/6aa87cbc833b4440a5ac9077e8554e7a/FLAG0364402e3 [2020-10-14 05:39:15,231 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:39:15,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-1.i [2020-10-14 05:39:15,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee90195cb/6aa87cbc833b4440a5ac9077e8554e7a/FLAG0364402e3 [2020-10-14 05:39:15,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee90195cb/6aa87cbc833b4440a5ac9077e8554e7a [2020-10-14 05:39:15,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:39:15,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:39:15,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:39:15,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:39:15,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:39:15,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:15" (1/1) ... [2020-10-14 05:39:15,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf0d2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:15, skipping insertion in model container [2020-10-14 05:39:15,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:15" (1/1) ... [2020-10-14 05:39:15,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:39:15,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:39:15,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:39:15,872 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:39:15,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:39:16,005 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:39:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16 WrapperNode [2020-10-14 05:39:16,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:39:16,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:39:16,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:39:16,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:39:16,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... [2020-10-14 05:39:16,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:39:16,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:39:16,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:39:16,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:39:16,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:39:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:39:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:39:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:39:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:39:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:39:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:39:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:39:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:39:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:39:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 05:39:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:39:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 05:39:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-14 05:39:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:39:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:39:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:39:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:39:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:39:16,425 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:39:16,425 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 05:39:16,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:16 BoogieIcfgContainer [2020-10-14 05:39:16,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:39:16,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:39:16,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:39:16,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:39:16,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:39:15" (1/3) ... [2020-10-14 05:39:16,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2911807f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:16, skipping insertion in model container [2020-10-14 05:39:16,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:16" (2/3) ... [2020-10-14 05:39:16,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2911807f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:16, skipping insertion in model container [2020-10-14 05:39:16,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:16" (3/3) ... [2020-10-14 05:39:16,440 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2020-10-14 05:39:16,452 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:39:16,460 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:39:16,476 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:39:16,502 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:39:16,502 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:39:16,502 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:39:16,503 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:39:16,503 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:39:16,503 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:39:16,503 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:39:16,503 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:39:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-14 05:39:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:39:16,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:16,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:16,530 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1745945109, now seen corresponding path program 1 times [2020-10-14 05:39:16,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:16,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429477193] [2020-10-14 05:39:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:16,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:16,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:16,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:16,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:17,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:17,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:39:17,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:39:17,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-14 05:39:17,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:17,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 05:39:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:17,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:39:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:17,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:17,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:17,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:17,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:17,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:39:17,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:17,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:17,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:17,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:39:17,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429477193] [2020-10-14 05:39:17,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:17,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:39:17,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725958519] [2020-10-14 05:39:17,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:39:17,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:39:17,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:39:17,277 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-14 05:39:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:17,415 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2020-10-14 05:39:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:39:17,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-14 05:39:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:17,425 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:39:17,426 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 05:39:17,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:39:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 05:39:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 05:39:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:39:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-14 05:39:17,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2020-10-14 05:39:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:17,468 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-14 05:39:17,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:39:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-14 05:39:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:39:17,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:17,470 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] [2020-10-14 05:39:17,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:39:17,471 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1772446864, now seen corresponding path program 1 times [2020-10-14 05:39:17,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:17,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821411582] [2020-10-14 05:39:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:17,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:17,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:17,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:39:17,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:39:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-14 05:39:17,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:17,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:39:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:17,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:39:17,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:39:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:18,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:18,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:18,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:18,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:18,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:39:18,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:18,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:18,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:18,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:18,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 05:39:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:39:18,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821411582] [2020-10-14 05:39:18,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:18,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:39:18,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216955487] [2020-10-14 05:39:18,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:39:18,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:18,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:39:18,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:39:18,020 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-10-14 05:39:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:18,164 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-10-14 05:39:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:39:18,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 05:39:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:18,171 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:39:18,171 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 05:39:18,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:39:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 05:39:18,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-10-14 05:39:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:39:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-14 05:39:18,189 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-10-14 05:39:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:18,192 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-14 05:39:18,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:39:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-14 05:39:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:39:18,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:18,194 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] [2020-10-14 05:39:18,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:39:18,195 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -974231694, now seen corresponding path program 1 times [2020-10-14 05:39:18,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:18,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931197665] [2020-10-14 05:39:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:18,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:18,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:18,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:39:18,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:39:18,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-14 05:39:18,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:18,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:39:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:39:18,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:18,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:18,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:18,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:18,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:18,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:18,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:39:18,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:18,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:39:18,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931197665] [2020-10-14 05:39:18,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:18,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:39:18,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337297461] [2020-10-14 05:39:18,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:39:18,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:18,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:39:18,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:39:18,773 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2020-10-14 05:39:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:18,912 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-10-14 05:39:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:39:18,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:39:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:18,914 INFO L225 Difference]: With dead ends: 82 [2020-10-14 05:39:18,914 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:39:18,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:39:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:39:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2020-10-14 05:39:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:39:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-14 05:39:18,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2020-10-14 05:39:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:18,923 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-14 05:39:18,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:39:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-14 05:39:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:39:18,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:18,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:18,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:39:18,924 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1606367988, now seen corresponding path program 2 times [2020-10-14 05:39:18,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:18,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288640271] [2020-10-14 05:39:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:18,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:19,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:19,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:19,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:39:19,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:39:19,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-14 05:39:19,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:19,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:19,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:39:19,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:39:19,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:39:19,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:19,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:19,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:19,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:19,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:19,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:39:19,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:19,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:19,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:39:19,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288640271] [2020-10-14 05:39:19,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:19,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:39:19,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430968381] [2020-10-14 05:39:19,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:39:19,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:19,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:39:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:39:19,489 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 7 states. [2020-10-14 05:39:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:19,753 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-10-14 05:39:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:39:19,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:39:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:19,755 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:39:19,755 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:39:19,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:39:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:39:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-14 05:39:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:39:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-14 05:39:19,776 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 24 [2020-10-14 05:39:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:19,787 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-14 05:39:19,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:39:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-14 05:39:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:39:19,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:19,791 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 05:39:19,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:39:19,792 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash -5002131, now seen corresponding path program 1 times [2020-10-14 05:39:19,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:19,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767562181] [2020-10-14 05:39:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:20,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:24,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:24,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:39:24,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:39:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4761 [2020-10-14 05:39:24,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:24,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:24,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:39:24,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:39:24,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:39:24,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:24,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:24,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:24,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:24,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:24,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:39:24,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:24,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:39:24,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767562181] [2020-10-14 05:39:24,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:24,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:39:24,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110300282] [2020-10-14 05:39:24,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:39:24,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:24,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:39:24,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:39:24,640 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 4 states. [2020-10-14 05:39:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:24,721 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2020-10-14 05:39:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:39:24,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-14 05:39:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:24,722 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:39:24,723 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:39:24,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:39:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:39:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2020-10-14 05:39:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:39:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-14 05:39:24,731 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 30 [2020-10-14 05:39:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:24,731 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-14 05:39:24,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:39:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-14 05:39:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:39:24,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:24,732 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] [2020-10-14 05:39:24,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:39:24,733 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:24,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2016138213, now seen corresponding path program 1 times [2020-10-14 05:39:24,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:24,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112708015] [2020-10-14 05:39:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:24,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:24,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:24,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:29,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:29,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:39:29,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:39:29,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:39:29,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:29,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:29,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:39:29,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:29,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:39:29,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:29,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:29,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:29,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:39:29,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:29,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:29,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:29,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:29,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:29,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:39:29,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112708015] [2020-10-14 05:39:29,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:29,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:39:29,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573192616] [2020-10-14 05:39:29,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:39:29,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:39:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:39:29,847 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 6 states. [2020-10-14 05:39:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:30,076 INFO L93 Difference]: Finished difference Result 163 states and 221 transitions. [2020-10-14 05:39:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:39:30,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-14 05:39:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:30,080 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:39:30,080 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 05:39:30,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:39:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 05:39:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 51. [2020-10-14 05:39:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:39:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-10-14 05:39:30,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 31 [2020-10-14 05:39:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:30,090 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-10-14 05:39:30,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:39:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-10-14 05:39:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:39:30,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:30,092 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 05:39:30,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:39:30,093 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2112082595, now seen corresponding path program 2 times [2020-10-14 05:39:30,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:30,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166223374] [2020-10-14 05:39:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:30,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:30,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:30,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:30,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:35,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:35,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:39:35,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:39:35,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:39:35,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:35,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:39:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 05:39:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:39:35,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:35,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:35,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:35,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:35,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:35,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:35,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:35,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:35,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:39:35,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166223374] [2020-10-14 05:39:35,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:35,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:39:35,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284987694] [2020-10-14 05:39:35,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:39:35,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:39:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:39:35,183 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 5 states. [2020-10-14 05:39:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:35,273 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2020-10-14 05:39:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:39:35,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-14 05:39:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:35,274 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:39:35,275 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:39:35,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:39:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:39:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-14 05:39:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:39:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-10-14 05:39:35,283 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 33 [2020-10-14 05:39:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:35,284 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-10-14 05:39:35,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:39:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-10-14 05:39:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:39:35,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:35,285 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-14 05:39:35,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:39:35,286 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1321749448, now seen corresponding path program 3 times [2020-10-14 05:39:35,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:35,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339844765] [2020-10-14 05:39:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:37,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:40,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:40,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:39:40,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:39:40,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:39:40,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:40,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:40,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:39:40,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:39:40,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:39:40,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:40,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:40,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:40,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:40,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:40,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:40,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:40,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:40,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 05:39:40,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339844765] [2020-10-14 05:39:40,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:40,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 05:39:40,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765928119] [2020-10-14 05:39:40,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:39:40,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:40,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:39:40,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:39:40,550 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand 8 states. [2020-10-14 05:39:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:40,816 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-10-14 05:39:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:39:40,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 05:39:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:40,818 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:39:40,818 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:39:40,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:39:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:39:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:39:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:39:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-14 05:39:40,834 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 36 [2020-10-14 05:39:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:40,835 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-14 05:39:40,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:39:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-14 05:39:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:39:40,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:40,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:40,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:39:40,844 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1767259122, now seen corresponding path program 1 times [2020-10-14 05:39:40,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:40,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360976501] [2020-10-14 05:39:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:40,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:40,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:41,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:42,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:45,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:45,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:39:45,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:39:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:39:45,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:45,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:45,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:39:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 05:39:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:39:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:46,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:46,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:46,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:46,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:46,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:46,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:46,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:46,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:46,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:39:46,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360976501] [2020-10-14 05:39:46,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:46,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:39:46,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515873096] [2020-10-14 05:39:46,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:39:46,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:39:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:39:46,088 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 8 states. [2020-10-14 05:39:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:46,276 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-10-14 05:39:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:39:46,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-14 05:39:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:46,278 INFO L225 Difference]: With dead ends: 106 [2020-10-14 05:39:46,278 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:39:46,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:39:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:39:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-14 05:39:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:39:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-14 05:39:46,290 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 37 [2020-10-14 05:39:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:46,291 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-14 05:39:46,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:39:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-14 05:39:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:39:46,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:46,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-14 05:39:46,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:39:46,295 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1330593405, now seen corresponding path program 1 times [2020-10-14 05:39:46,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:46,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581200468] [2020-10-14 05:39:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:46,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:46,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:46,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:46,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:47,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:51,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:51,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:39:51,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:39:51,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 05:39:51,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:51,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:51,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:39:51,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:51,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:39:51,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:51,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:51,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:51,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:51,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:51,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:51,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:51,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:51,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:39:51,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581200468] [2020-10-14 05:39:51,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:51,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:39:51,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397888131] [2020-10-14 05:39:51,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:39:51,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:39:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:39:51,441 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 7 states. [2020-10-14 05:39:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:51,681 INFO L93 Difference]: Finished difference Result 281 states and 370 transitions. [2020-10-14 05:39:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:39:51,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-14 05:39:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:51,683 INFO L225 Difference]: With dead ends: 281 [2020-10-14 05:39:51,683 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 05:39:51,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:39:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 05:39:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 69. [2020-10-14 05:39:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:39:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-10-14 05:39:51,699 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 38 [2020-10-14 05:39:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:51,699 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-10-14 05:39:51,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:39:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-10-14 05:39:51,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:39:51,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:51,701 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-14 05:39:51,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:39:51,701 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1564585723, now seen corresponding path program 2 times [2020-10-14 05:39:51,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:51,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157581836] [2020-10-14 05:39:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:51,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:51,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:51,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:52,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:56,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:39:56,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:39:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:39:56,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:56,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:39:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:39:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:39:56,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:56,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:56,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:56,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:39:56,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:39:56,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:56,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:39:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-14 05:39:56,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157581836] [2020-10-14 05:39:56,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:39:56,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:39:56,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013402473] [2020-10-14 05:39:56,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:39:56,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:39:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:39:56,796 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 6 states. [2020-10-14 05:39:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:56,955 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-10-14 05:39:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:39:56,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-14 05:39:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:56,957 INFO L225 Difference]: With dead ends: 174 [2020-10-14 05:39:56,957 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 05:39:56,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:39:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 05:39:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 73. [2020-10-14 05:39:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:39:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-14 05:39:56,973 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 40 [2020-10-14 05:39:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:56,973 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-14 05:39:56,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:39:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-14 05:39:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:39:56,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:56,975 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:56,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:39:56,975 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash -549819520, now seen corresponding path program 3 times [2020-10-14 05:39:56,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:56,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246327115] [2020-10-14 05:39:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:56,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:57,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:57,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:57,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:57,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:58,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:02,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:40:02,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:40:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:02,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:02,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:02,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:02,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:02,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:02,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:02,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:02,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:02,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:02,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:02,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 05:40:02,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246327115] [2020-10-14 05:40:02,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:02,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:40:02,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969010543] [2020-10-14 05:40:02,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:40:02,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:40:02,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:40:02,093 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 8 states. [2020-10-14 05:40:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:02,430 INFO L93 Difference]: Finished difference Result 332 states and 438 transitions. [2020-10-14 05:40:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:40:02,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-14 05:40:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:02,433 INFO L225 Difference]: With dead ends: 332 [2020-10-14 05:40:02,433 INFO L226 Difference]: Without dead ends: 274 [2020-10-14 05:40:02,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:40:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-14 05:40:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 75. [2020-10-14 05:40:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:40:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-14 05:40:02,446 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 42 [2020-10-14 05:40:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:02,446 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-14 05:40:02,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:40:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-14 05:40:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:40:02,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:02,447 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:40:02,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:40:02,447 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -384800254, now seen corresponding path program 4 times [2020-10-14 05:40:02,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:02,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71910116] [2020-10-14 05:40:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:02,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:02,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:03,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:03,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:07,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:07,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:40:07,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 05:40:07,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:40:07,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:07,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:07,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:40:07,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:07,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:40:07,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:40:07,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:07,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 05:40:07,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71910116] [2020-10-14 05:40:07,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:07,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:40:07,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286359026] [2020-10-14 05:40:07,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:40:07,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:40:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:40:07,583 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 7 states. [2020-10-14 05:40:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:07,841 INFO L93 Difference]: Finished difference Result 223 states and 289 transitions. [2020-10-14 05:40:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:40:07,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-14 05:40:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:07,843 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:40:07,843 INFO L226 Difference]: Without dead ends: 197 [2020-10-14 05:40:07,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:40:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-14 05:40:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 77. [2020-10-14 05:40:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:40:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2020-10-14 05:40:07,857 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 44 [2020-10-14 05:40:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:07,857 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2020-10-14 05:40:07,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:40:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2020-10-14 05:40:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:40:07,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:07,858 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:40:07,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:40:07,858 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash -647349955, now seen corresponding path program 5 times [2020-10-14 05:40:07,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:07,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936706403] [2020-10-14 05:40:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:07,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:07,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:08,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:08,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:12,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:12,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:40:12,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:40:12,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 05:40:12,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:12,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:40:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:12,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:40:12,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:40:13,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:13,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:13,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:13,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:13,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:13,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:13,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:13,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:13,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:40:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 05:40:13,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936706403] [2020-10-14 05:40:13,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:13,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:40:13,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918091273] [2020-10-14 05:40:13,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:40:13,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:40:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:40:13,089 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 8 states. [2020-10-14 05:40:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:13,533 INFO L93 Difference]: Finished difference Result 270 states and 352 transitions. [2020-10-14 05:40:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:40:13,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-14 05:40:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:13,538 INFO L225 Difference]: With dead ends: 270 [2020-10-14 05:40:13,538 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 05:40:13,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:40:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 05:40:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 79. [2020-10-14 05:40:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:40:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-10-14 05:40:13,564 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 46 [2020-10-14 05:40:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:13,565 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-10-14 05:40:13,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:40:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-10-14 05:40:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:40:13,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:13,566 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:40:13,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:40:13,567 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash 445457848, now seen corresponding path program 6 times [2020-10-14 05:40:13,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:13,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846268015] [2020-10-14 05:40:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:13,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:13,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:14,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:14,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:17,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:18,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:18,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:40:18,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 05:40:18,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 05:40:18,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:18,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:40:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:40:18,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:18,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:18,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:18,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:18,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:18,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:18,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:18,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:18,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:18,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:18,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:18,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:18,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:40:18,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846268015] [2020-10-14 05:40:18,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:18,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:40:18,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054826811] [2020-10-14 05:40:18,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:40:18,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:40:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:40:18,848 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 10 states. [2020-10-14 05:40:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:19,302 INFO L93 Difference]: Finished difference Result 203 states and 263 transitions. [2020-10-14 05:40:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:40:19,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-14 05:40:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:19,304 INFO L225 Difference]: With dead ends: 203 [2020-10-14 05:40:19,304 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 05:40:19,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:40:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 05:40:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 120. [2020-10-14 05:40:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 05:40:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 153 transitions. [2020-10-14 05:40:19,328 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 153 transitions. Word has length 48 [2020-10-14 05:40:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:19,330 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 153 transitions. [2020-10-14 05:40:19,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:40:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 153 transitions. [2020-10-14 05:40:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:19,333 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-14 05:40:19,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:40:19,335 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash 994759872, now seen corresponding path program 1 times [2020-10-14 05:40:19,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:19,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694276225] [2020-10-14 05:40:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:19,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:19,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:19,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:21,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:21,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:21,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:21,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:22,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:23,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:24,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:24,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:24,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 05:40:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 05:40:24,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:24,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:40:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:40:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:40:24,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:24,671 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2020-10-14 05:40:24,864 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-14 05:40:25,024 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2020-10-14 05:40:25,278 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2020-10-14 05:40:25,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:25,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:25,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:25,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:25,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:25,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:25,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:40:25,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694276225] [2020-10-14 05:40:25,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:25,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:40:25,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701634712] [2020-10-14 05:40:25,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:40:25,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:40:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:40:25,342 INFO L87 Difference]: Start difference. First operand 120 states and 153 transitions. Second operand 9 states. [2020-10-14 05:40:26,033 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-14 05:40:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:26,240 INFO L93 Difference]: Finished difference Result 153 states and 195 transitions. [2020-10-14 05:40:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:40:26,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-14 05:40:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:26,242 INFO L225 Difference]: With dead ends: 153 [2020-10-14 05:40:26,242 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 05:40:26,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:40:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 05:40:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-14 05:40:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:40:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2020-10-14 05:40:26,264 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 51 [2020-10-14 05:40:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:26,264 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2020-10-14 05:40:26,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:40:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2020-10-14 05:40:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:26,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:26,265 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-14 05:40:26,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:40:26,266 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash 601732862, now seen corresponding path program 1 times [2020-10-14 05:40:26,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:26,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380798139] [2020-10-14 05:40:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:26,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:26,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:26,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:27,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:28,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:29,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:29,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:29,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:29,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:31,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:31,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:31,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:31,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-14 05:40:31,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 05:40:31,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:31,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:40:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:31,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:40:31,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:31,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:31,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:31,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:31,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:31,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:31,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:31,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:31,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:31,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:31,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:31,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:40:31,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380798139] [2020-10-14 05:40:31,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:31,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:40:31,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364197328] [2020-10-14 05:40:31,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:40:31,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:31,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:40:31,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:40:31,723 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand 14 states. [2020-10-14 05:40:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:33,881 INFO L93 Difference]: Finished difference Result 343 states and 442 transitions. [2020-10-14 05:40:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 05:40:33,882 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-14 05:40:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:33,884 INFO L225 Difference]: With dead ends: 343 [2020-10-14 05:40:33,884 INFO L226 Difference]: Without dead ends: 296 [2020-10-14 05:40:33,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:40:33,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-14 05:40:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 186. [2020-10-14 05:40:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-14 05:40:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 239 transitions. [2020-10-14 05:40:33,914 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 239 transitions. Word has length 51 [2020-10-14 05:40:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:33,915 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 239 transitions. [2020-10-14 05:40:33,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:40:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 239 transitions. [2020-10-14 05:40:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:33,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:33,916 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-14 05:40:33,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:40:33,916 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash 407953858, now seen corresponding path program 2 times [2020-10-14 05:40:33,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:33,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448219978] [2020-10-14 05:40:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:35,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:37,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:37,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:38,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:38,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:38,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:38,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:38,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:40:38,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:39,356 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 43 [2020-10-14 05:40:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-14 05:40:39,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448219978] [2020-10-14 05:40:39,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:39,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:40:39,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050145993] [2020-10-14 05:40:39,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:40:39,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:40:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:40:39,403 INFO L87 Difference]: Start difference. First operand 186 states and 239 transitions. Second operand 9 states. [2020-10-14 05:40:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:40,000 INFO L93 Difference]: Finished difference Result 310 states and 399 transitions. [2020-10-14 05:40:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:40:40,001 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-14 05:40:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:40,003 INFO L225 Difference]: With dead ends: 310 [2020-10-14 05:40:40,003 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 05:40:40,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:40:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 05:40:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2020-10-14 05:40:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-14 05:40:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 246 transitions. [2020-10-14 05:40:40,034 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 246 transitions. Word has length 51 [2020-10-14 05:40:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:40,034 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 246 transitions. [2020-10-14 05:40:40,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:40:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 246 transitions. [2020-10-14 05:40:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:40,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:40,035 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:40:40,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:40:40,035 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash 820587580, now seen corresponding path program 1 times [2020-10-14 05:40:40,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:40,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211230208] [2020-10-14 05:40:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:40,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:40:40,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 05:40:40,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:40:40,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:40,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:40,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:40,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:40,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:40,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:40,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:40,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:40,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:40,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:40,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:40,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:40,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:40:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 05:40:40,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211230208] [2020-10-14 05:40:40,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:40,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:40:40,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805550567] [2020-10-14 05:40:40,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:40:40,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:40:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:40:40,438 INFO L87 Difference]: Start difference. First operand 195 states and 246 transitions. Second operand 9 states. [2020-10-14 05:40:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:40,890 INFO L93 Difference]: Finished difference Result 354 states and 446 transitions. [2020-10-14 05:40:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:40:40,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-14 05:40:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:40,893 INFO L225 Difference]: With dead ends: 354 [2020-10-14 05:40:40,894 INFO L226 Difference]: Without dead ends: 349 [2020-10-14 05:40:40,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:40:40,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-14 05:40:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 275. [2020-10-14 05:40:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-14 05:40:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 351 transitions. [2020-10-14 05:40:40,984 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 351 transitions. Word has length 51 [2020-10-14 05:40:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:40,985 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 351 transitions. [2020-10-14 05:40:40,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:40:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 351 transitions. [2020-10-14 05:40:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:40,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:40,990 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-14 05:40:40,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:40:40,991 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:40,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:40,991 INFO L82 PathProgramCache]: Analyzing trace with hash 233781566, now seen corresponding path program 1 times [2020-10-14 05:40:40,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:40,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019194881] [2020-10-14 05:40:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:41,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:41,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:41,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:41,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:41,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:42,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:42,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:42,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:43,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:46,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:46,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:46,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 05:40:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:40:46,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:46,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:40:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:40:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:46,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:46,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:46,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:46,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:40:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:40:46,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019194881] [2020-10-14 05:40:46,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:46,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:40:46,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930796811] [2020-10-14 05:40:46,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:40:46,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:40:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:40:46,473 INFO L87 Difference]: Start difference. First operand 275 states and 351 transitions. Second operand 12 states. [2020-10-14 05:40:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:47,294 INFO L93 Difference]: Finished difference Result 496 states and 629 transitions. [2020-10-14 05:40:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:40:47,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-14 05:40:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:47,299 INFO L225 Difference]: With dead ends: 496 [2020-10-14 05:40:47,299 INFO L226 Difference]: Without dead ends: 397 [2020-10-14 05:40:47,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:40:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-14 05:40:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 303. [2020-10-14 05:40:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-14 05:40:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 383 transitions. [2020-10-14 05:40:47,371 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 383 transitions. Word has length 51 [2020-10-14 05:40:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:47,372 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 383 transitions. [2020-10-14 05:40:47,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:40:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 383 transitions. [2020-10-14 05:40:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:47,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:47,377 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-14 05:40:47,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:40:47,378 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 961136190, now seen corresponding path program 1 times [2020-10-14 05:40:47,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:47,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258412223] [2020-10-14 05:40:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:47,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:47,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:47,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:47,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:48,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:48,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:49,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:49,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:49,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:52,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:40:52,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:52,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:40:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:52,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:52,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:52,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:52,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:40:52,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258412223] [2020-10-14 05:40:52,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:52,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:40:52,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065675106] [2020-10-14 05:40:52,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:40:52,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:52,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:40:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:40:52,681 INFO L87 Difference]: Start difference. First operand 303 states and 383 transitions. Second operand 12 states. [2020-10-14 05:40:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:40:53,546 INFO L93 Difference]: Finished difference Result 515 states and 642 transitions. [2020-10-14 05:40:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:40:53,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-14 05:40:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:40:53,548 INFO L225 Difference]: With dead ends: 515 [2020-10-14 05:40:53,548 INFO L226 Difference]: Without dead ends: 359 [2020-10-14 05:40:53,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:40:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-14 05:40:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 292. [2020-10-14 05:40:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-14 05:40:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 357 transitions. [2020-10-14 05:40:53,595 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 357 transitions. Word has length 51 [2020-10-14 05:40:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:40:53,596 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 357 transitions. [2020-10-14 05:40:53,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:40:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 357 transitions. [2020-10-14 05:40:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:40:53,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:40:53,597 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-14 05:40:53,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:40:53,598 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:40:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:40:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash 767357186, now seen corresponding path program 2 times [2020-10-14 05:40:53,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:40:53,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499947833] [2020-10-14 05:40:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:40:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:53,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:53,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:53,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:54,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:54,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:55,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:55,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:55,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:56,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:56,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:57,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:57,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:57,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:58,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:58,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:40:58,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 05:40:58,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 05:40:58,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:58,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:40:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:40:58,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:40:58,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:59,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:40:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:40:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:40:59,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:40:59,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:40:59,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:40:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:40:59,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499947833] [2020-10-14 05:40:59,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:40:59,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:40:59,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611224664] [2020-10-14 05:40:59,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:40:59,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:40:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:40:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:40:59,014 INFO L87 Difference]: Start difference. First operand 292 states and 357 transitions. Second operand 14 states. [2020-10-14 05:41:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:01,421 INFO L93 Difference]: Finished difference Result 532 states and 650 transitions. [2020-10-14 05:41:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 05:41:01,422 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-14 05:41:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:01,425 INFO L225 Difference]: With dead ends: 532 [2020-10-14 05:41:01,425 INFO L226 Difference]: Without dead ends: 464 [2020-10-14 05:41:01,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=728, Invalid=2578, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:41:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-10-14 05:41:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 302. [2020-10-14 05:41:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-14 05:41:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 369 transitions. [2020-10-14 05:41:01,481 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 369 transitions. Word has length 51 [2020-10-14 05:41:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:01,481 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 369 transitions. [2020-10-14 05:41:01,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:41:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 369 transitions. [2020-10-14 05:41:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:41:01,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:01,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:41:01,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:41:01,484 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:01,484 INFO L82 PathProgramCache]: Analyzing trace with hash -252477434, now seen corresponding path program 1 times [2020-10-14 05:41:01,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:01,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118554592] [2020-10-14 05:41:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:01,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:01,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:01,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:02,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:02,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:02,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:03,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:03,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:04,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:05,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:05,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:06,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:06,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:41:06,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:06,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:41:06,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:06,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:06,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:06,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:06,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:06,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:06,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-14 05:41:06,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118554592] [2020-10-14 05:41:06,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:06,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:41:06,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803552245] [2020-10-14 05:41:06,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:41:06,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:41:06,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:41:06,677 INFO L87 Difference]: Start difference. First operand 302 states and 369 transitions. Second operand 9 states. [2020-10-14 05:41:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:06,918 INFO L93 Difference]: Finished difference Result 347 states and 423 transitions. [2020-10-14 05:41:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:41:06,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-14 05:41:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:06,922 INFO L225 Difference]: With dead ends: 347 [2020-10-14 05:41:06,922 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 05:41:06,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:41:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 05:41:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 286. [2020-10-14 05:41:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-14 05:41:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 347 transitions. [2020-10-14 05:41:06,975 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 347 transitions. Word has length 58 [2020-10-14 05:41:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:06,975 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 347 transitions. [2020-10-14 05:41:06,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:41:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 347 transitions. [2020-10-14 05:41:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:41:06,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:06,976 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2020-10-14 05:41:06,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:41:06,977 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1322135589, now seen corresponding path program 2 times [2020-10-14 05:41:06,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:06,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003003732] [2020-10-14 05:41:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:07,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:07,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:10,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:10,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:10,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:11,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:12,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:41:12,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 05:41:12,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:41:12,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:12,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:41:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:41:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:12,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:12,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:12,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:12,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:12,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-14 05:41:12,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003003732] [2020-10-14 05:41:12,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:12,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:41:12,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771470577] [2020-10-14 05:41:12,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:41:12,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:12,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:41:12,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:41:12,082 INFO L87 Difference]: Start difference. First operand 286 states and 347 transitions. Second operand 7 states. [2020-10-14 05:41:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:12,331 INFO L93 Difference]: Finished difference Result 375 states and 456 transitions. [2020-10-14 05:41:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:41:12,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-14 05:41:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:12,333 INFO L225 Difference]: With dead ends: 375 [2020-10-14 05:41:12,333 INFO L226 Difference]: Without dead ends: 290 [2020-10-14 05:41:12,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:41:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-14 05:41:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 245. [2020-10-14 05:41:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-14 05:41:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 301 transitions. [2020-10-14 05:41:12,390 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 301 transitions. Word has length 60 [2020-10-14 05:41:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:12,391 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 301 transitions. [2020-10-14 05:41:12,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:41:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 301 transitions. [2020-10-14 05:41:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 05:41:12,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:12,392 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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] [2020-10-14 05:41:12,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:41:12,393 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash 388531404, now seen corresponding path program 3 times [2020-10-14 05:41:12,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:12,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598727810] [2020-10-14 05:41:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:12,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:14,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:16,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:16,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:16,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:16,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:17,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:17,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 05:41:17,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 05:41:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:41:17,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:17,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:17,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:41:17,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:17,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:41:17,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:17,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:17,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:17,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:17,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:17,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:17,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-14 05:41:17,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598727810] [2020-10-14 05:41:17,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:17,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:41:17,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167872947] [2020-10-14 05:41:17,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:41:17,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:41:17,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:41:17,626 INFO L87 Difference]: Start difference. First operand 245 states and 301 transitions. Second operand 10 states. [2020-10-14 05:41:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:17,973 INFO L93 Difference]: Finished difference Result 280 states and 343 transitions. [2020-10-14 05:41:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:41:17,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-14 05:41:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:17,975 INFO L225 Difference]: With dead ends: 280 [2020-10-14 05:41:17,976 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 05:41:17,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:41:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 05:41:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-14 05:41:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 05:41:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 255 transitions. [2020-10-14 05:41:18,016 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 255 transitions. Word has length 61 [2020-10-14 05:41:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:18,016 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 255 transitions. [2020-10-14 05:41:18,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:41:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 255 transitions. [2020-10-14 05:41:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 05:41:18,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:18,018 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 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] [2020-10-14 05:41:18,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:41:18,018 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash 124105457, now seen corresponding path program 4 times [2020-10-14 05:41:18,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:18,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001141625] [2020-10-14 05:41:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:18,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:18,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:18,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:21,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:21,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:22,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:22,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:22,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:23,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:23,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 05:41:23,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 05:41:23,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:41:23,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:23,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:23,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:41:23,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:23,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:41:23,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:23,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:23,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:23,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:23,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:23,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:23,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:23,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:23,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:23,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:41:23,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001141625] [2020-10-14 05:41:23,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:23,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:41:23,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355025239] [2020-10-14 05:41:23,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:41:23,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:41:23,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:41:23,155 INFO L87 Difference]: Start difference. First operand 202 states and 255 transitions. Second operand 8 states. [2020-10-14 05:41:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:23,422 INFO L93 Difference]: Finished difference Result 557 states and 711 transitions. [2020-10-14 05:41:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:41:23,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-14 05:41:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:23,424 INFO L225 Difference]: With dead ends: 557 [2020-10-14 05:41:23,425 INFO L226 Difference]: Without dead ends: 471 [2020-10-14 05:41:23,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:41:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-10-14 05:41:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 226. [2020-10-14 05:41:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 05:41:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2020-10-14 05:41:23,473 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 63 [2020-10-14 05:41:23,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:23,473 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2020-10-14 05:41:23,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:41:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2020-10-14 05:41:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 05:41:23,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:23,475 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2020-10-14 05:41:23,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:41:23,475 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash -586159146, now seen corresponding path program 5 times [2020-10-14 05:41:23,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:23,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795640678] [2020-10-14 05:41:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:23,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:23,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:23,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:23,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:23,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:24,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:25,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:25,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:25,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:25,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:26,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:28,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:41:28,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:28,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:41:28,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:28,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:28,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:28,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:28,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:28,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:28,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:28,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:28,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:41:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:41:28,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795640678] [2020-10-14 05:41:28,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:28,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:41:28,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363647607] [2020-10-14 05:41:28,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:41:28,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:28,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:41:28,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:41:28,729 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand 9 states. [2020-10-14 05:41:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:29,232 INFO L93 Difference]: Finished difference Result 749 states and 958 transitions. [2020-10-14 05:41:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:41:29,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-14 05:41:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:29,236 INFO L225 Difference]: With dead ends: 749 [2020-10-14 05:41:29,237 INFO L226 Difference]: Without dead ends: 663 [2020-10-14 05:41:29,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:41:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-10-14 05:41:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 228. [2020-10-14 05:41:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-14 05:41:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 288 transitions. [2020-10-14 05:41:29,296 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 288 transitions. Word has length 65 [2020-10-14 05:41:29,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:29,296 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 288 transitions. [2020-10-14 05:41:29,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:41:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 288 transitions. [2020-10-14 05:41:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 05:41:29,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:29,298 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 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] [2020-10-14 05:41:29,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:41:29,298 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash -250642565, now seen corresponding path program 6 times [2020-10-14 05:41:29,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:29,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080970909] [2020-10-14 05:41:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:29,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:29,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:29,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:29,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:30,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:31,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:31,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:32,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:34,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:34,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 05:41:34,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 05:41:34,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 05:41:34,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:34,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:41:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 05:41:34,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:41:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:34,789 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-14 05:41:34,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:34,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:34,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:34,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:34,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:41:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080970909] [2020-10-14 05:41:35,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:35,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:41:35,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125768637] [2020-10-14 05:41:35,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:41:35,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:41:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:41:35,006 INFO L87 Difference]: Start difference. First operand 228 states and 288 transitions. Second operand 12 states. [2020-10-14 05:41:35,253 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-14 05:41:35,579 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-14 05:41:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:35,636 INFO L93 Difference]: Finished difference Result 380 states and 478 transitions. [2020-10-14 05:41:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:41:35,637 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-14 05:41:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:35,638 INFO L225 Difference]: With dead ends: 380 [2020-10-14 05:41:35,639 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 05:41:35,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:41:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 05:41:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 213. [2020-10-14 05:41:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-14 05:41:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 267 transitions. [2020-10-14 05:41:35,696 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 267 transitions. Word has length 67 [2020-10-14 05:41:35,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:35,698 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 267 transitions. [2020-10-14 05:41:35,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:41:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 267 transitions. [2020-10-14 05:41:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:41:35,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:35,704 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 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] [2020-10-14 05:41:35,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:41:35,705 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1839176464, now seen corresponding path program 7 times [2020-10-14 05:41:35,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:35,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897465033] [2020-10-14 05:41:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:36,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:36,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:41:36,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:36,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-14 05:41:36,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:36,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:41:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 05:41:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:41:36,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:36,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:36,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:36,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:36,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:36,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:36,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:41:36,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:36,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:36,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:36,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:41:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-14 05:41:36,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897465033] [2020-10-14 05:41:36,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:36,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:41:36,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927509853] [2020-10-14 05:41:36,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:41:36,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:41:36,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:41:36,317 INFO L87 Difference]: Start difference. First operand 213 states and 267 transitions. Second operand 11 states. [2020-10-14 05:41:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:36,852 INFO L93 Difference]: Finished difference Result 386 states and 487 transitions. [2020-10-14 05:41:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:41:36,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-14 05:41:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:36,855 INFO L225 Difference]: With dead ends: 386 [2020-10-14 05:41:36,855 INFO L226 Difference]: Without dead ends: 381 [2020-10-14 05:41:36,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:41:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-14 05:41:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 284. [2020-10-14 05:41:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-14 05:41:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2020-10-14 05:41:36,926 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 72 [2020-10-14 05:41:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:36,926 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2020-10-14 05:41:36,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:41:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2020-10-14 05:41:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:41:36,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:36,928 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:41:36,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:41:36,928 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1868984818, now seen corresponding path program 8 times [2020-10-14 05:41:36,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:36,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257497614] [2020-10-14 05:41:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:37,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:37,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:39,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:40,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:40,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:41,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:41,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:41,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:41:41,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 05:41:41,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 05:41:41,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:41,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:41:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:41:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:42,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:42,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:42,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:42,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:42,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-14 05:41:42,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257497614] [2020-10-14 05:41:42,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:42,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:41:42,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111105747] [2020-10-14 05:41:42,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:41:42,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:41:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:41:42,468 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand 16 states. [2020-10-14 05:41:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:44,123 INFO L93 Difference]: Finished difference Result 1048 states and 1341 transitions. [2020-10-14 05:41:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:41:44,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-14 05:41:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:44,126 INFO L225 Difference]: With dead ends: 1048 [2020-10-14 05:41:44,127 INFO L226 Difference]: Without dead ends: 811 [2020-10-14 05:41:44,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:41:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-14 05:41:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 500. [2020-10-14 05:41:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-14 05:41:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 619 transitions. [2020-10-14 05:41:44,242 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 619 transitions. Word has length 72 [2020-10-14 05:41:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:44,243 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 619 transitions. [2020-10-14 05:41:44,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:41:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 619 transitions. [2020-10-14 05:41:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:41:44,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:44,245 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:41:44,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:41:44,245 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash 650352498, now seen corresponding path program 9 times [2020-10-14 05:41:44,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:44,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202814396] [2020-10-14 05:41:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:44,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:44,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:44,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:44,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:45,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:48,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:49,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:41:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 05:41:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:41:49,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:49,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:49,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:49,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:49,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:49,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:49,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:49,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:49,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:49,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:49,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:41:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-14 05:41:49,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202814396] [2020-10-14 05:41:49,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:49,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:41:49,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435250536] [2020-10-14 05:41:49,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:41:49,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:49,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:41:49,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:41:49,649 INFO L87 Difference]: Start difference. First operand 500 states and 619 transitions. Second operand 10 states. [2020-10-14 05:41:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:50,173 INFO L93 Difference]: Finished difference Result 870 states and 1071 transitions. [2020-10-14 05:41:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:41:50,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-14 05:41:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:50,176 INFO L225 Difference]: With dead ends: 870 [2020-10-14 05:41:50,176 INFO L226 Difference]: Without dead ends: 726 [2020-10-14 05:41:50,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:41:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-10-14 05:41:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 615. [2020-10-14 05:41:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-10-14 05:41:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 761 transitions. [2020-10-14 05:41:50,331 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 761 transitions. Word has length 72 [2020-10-14 05:41:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:50,331 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 761 transitions. [2020-10-14 05:41:50,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:41:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 761 transitions. [2020-10-14 05:41:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:41:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:50,333 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:41:50,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:41:50,334 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash 750219702, now seen corresponding path program 10 times [2020-10-14 05:41:50,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:50,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524833888] [2020-10-14 05:41:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:50,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:52,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:52,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:54,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:54,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:54,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:55,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:41:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:41:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:41:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:41:56,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:41:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:56,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:41:56,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:41:56,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:41:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:41:56,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:41:56,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:41:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:41:56,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:41:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:41:56,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:41:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:41:56,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524833888] [2020-10-14 05:41:56,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:41:56,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:41:56,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792430990] [2020-10-14 05:41:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:41:56,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:41:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:41:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:41:56,233 INFO L87 Difference]: Start difference. First operand 615 states and 761 transitions. Second operand 18 states. [2020-10-14 05:41:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:41:58,693 INFO L93 Difference]: Finished difference Result 1087 states and 1338 transitions. [2020-10-14 05:41:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:41:58,693 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-14 05:41:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:41:58,696 INFO L225 Difference]: With dead ends: 1087 [2020-10-14 05:41:58,696 INFO L226 Difference]: Without dead ends: 909 [2020-10-14 05:41:58,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:41:58,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-10-14 05:41:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 718. [2020-10-14 05:41:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-14 05:41:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 873 transitions. [2020-10-14 05:41:58,851 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 873 transitions. Word has length 72 [2020-10-14 05:41:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:41:58,852 INFO L479 AbstractCegarLoop]: Abstraction has 718 states and 873 transitions. [2020-10-14 05:41:58,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:41:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 873 transitions. [2020-10-14 05:41:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:41:58,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:41:58,853 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:41:58,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:41:58,853 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:41:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:41:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1611785330, now seen corresponding path program 11 times [2020-10-14 05:41:58,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:41:58,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783661666] [2020-10-14 05:41:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:41:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:41:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:58,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:59,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:59,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:41:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:01,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:01,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:03,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:03,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:42:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:42:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:42:03,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:04,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:04,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:04,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-14 05:42:04,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783661666] [2020-10-14 05:42:04,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:04,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:42:04,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364668158] [2020-10-14 05:42:04,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:42:04,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:42:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:42:04,874 INFO L87 Difference]: Start difference. First operand 718 states and 873 transitions. Second operand 16 states. [2020-10-14 05:42:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:06,734 INFO L93 Difference]: Finished difference Result 1069 states and 1311 transitions. [2020-10-14 05:42:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:42:06,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-14 05:42:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:06,739 INFO L225 Difference]: With dead ends: 1069 [2020-10-14 05:42:06,739 INFO L226 Difference]: Without dead ends: 931 [2020-10-14 05:42:06,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:42:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-14 05:42:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 766. [2020-10-14 05:42:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-14 05:42:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 916 transitions. [2020-10-14 05:42:06,885 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 916 transitions. Word has length 72 [2020-10-14 05:42:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:06,886 INFO L479 AbstractCegarLoop]: Abstraction has 766 states and 916 transitions. [2020-10-14 05:42:06,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:42:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 916 transitions. [2020-10-14 05:42:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:42:06,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:06,888 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:42:06,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:42:06,888 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1418006326, now seen corresponding path program 12 times [2020-10-14 05:42:06,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:06,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965565120] [2020-10-14 05:42:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:06,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:07,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:07,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:08,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:08,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:09,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:10,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:11,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:11,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:12,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:42:12,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:12,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:12,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:12,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:12,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:12,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:42:12,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965565120] [2020-10-14 05:42:12,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:12,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:42:12,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883934678] [2020-10-14 05:42:12,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:42:12,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:42:12,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:42:12,962 INFO L87 Difference]: Start difference. First operand 766 states and 916 transitions. Second operand 18 states. [2020-10-14 05:42:14,248 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-14 05:42:15,597 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-14 05:42:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:16,934 INFO L93 Difference]: Finished difference Result 1443 states and 1706 transitions. [2020-10-14 05:42:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:42:16,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-14 05:42:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:16,937 INFO L225 Difference]: With dead ends: 1443 [2020-10-14 05:42:16,938 INFO L226 Difference]: Without dead ends: 941 [2020-10-14 05:42:16,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=455, Invalid=1525, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:42:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2020-10-14 05:42:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 762. [2020-10-14 05:42:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2020-10-14 05:42:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 902 transitions. [2020-10-14 05:42:17,173 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 902 transitions. Word has length 72 [2020-10-14 05:42:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:17,173 INFO L479 AbstractCegarLoop]: Abstraction has 762 states and 902 transitions. [2020-10-14 05:42:17,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:42:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 902 transitions. [2020-10-14 05:42:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:42:17,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:17,176 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:42:17,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:42:17,177 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash 406402990, now seen corresponding path program 13 times [2020-10-14 05:42:17,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:17,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188359035] [2020-10-14 05:42:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:17,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:17,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:17,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:17,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:18,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:19,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:22,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:42:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 05:42:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:42:22,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:22,603 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2020-10-14 05:42:22,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:22,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:22,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:22,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:22,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:22,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:22,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:22,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-14 05:42:22,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188359035] [2020-10-14 05:42:22,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:22,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:42:22,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646881436] [2020-10-14 05:42:22,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:42:22,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:42:22,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:42:22,651 INFO L87 Difference]: Start difference. First operand 762 states and 902 transitions. Second operand 10 states. [2020-10-14 05:42:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:23,363 INFO L93 Difference]: Finished difference Result 1031 states and 1206 transitions. [2020-10-14 05:42:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:42:23,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-14 05:42:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:23,367 INFO L225 Difference]: With dead ends: 1031 [2020-10-14 05:42:23,367 INFO L226 Difference]: Without dead ends: 894 [2020-10-14 05:42:23,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:42:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-14 05:42:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 752. [2020-10-14 05:42:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-10-14 05:42:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 880 transitions. [2020-10-14 05:42:23,512 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 880 transitions. Word has length 72 [2020-10-14 05:42:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:23,512 INFO L479 AbstractCegarLoop]: Abstraction has 752 states and 880 transitions. [2020-10-14 05:42:23,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:42:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 880 transitions. [2020-10-14 05:42:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:42:23,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:23,514 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:42:23,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:42:23,515 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:23,515 INFO L82 PathProgramCache]: Analyzing trace with hash -278041939, now seen corresponding path program 14 times [2020-10-14 05:42:23,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:23,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185541512] [2020-10-14 05:42:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:23,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:24,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:25,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:26,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:27,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:28,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:42:28,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 05:42:28,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:42:28,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:29,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:29,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:29,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:29,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:29,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:29,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:29,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:29,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:29,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:42:29,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185541512] [2020-10-14 05:42:29,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:29,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:42:29,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893236764] [2020-10-14 05:42:29,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:42:29,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:42:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:42:29,163 INFO L87 Difference]: Start difference. First operand 752 states and 880 transitions. Second operand 13 states. [2020-10-14 05:42:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:30,812 INFO L93 Difference]: Finished difference Result 1301 states and 1565 transitions. [2020-10-14 05:42:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:42:30,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-10-14 05:42:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:30,816 INFO L225 Difference]: With dead ends: 1301 [2020-10-14 05:42:30,816 INFO L226 Difference]: Without dead ends: 1241 [2020-10-14 05:42:30,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:42:30,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-10-14 05:42:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 967. [2020-10-14 05:42:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-10-14 05:42:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1156 transitions. [2020-10-14 05:42:30,997 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1156 transitions. Word has length 74 [2020-10-14 05:42:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:30,997 INFO L479 AbstractCegarLoop]: Abstraction has 967 states and 1156 transitions. [2020-10-14 05:42:30,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:42:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1156 transitions. [2020-10-14 05:42:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:42:30,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:31,000 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:42:31,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:42:31,000 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:31,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1396807055, now seen corresponding path program 15 times [2020-10-14 05:42:31,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:31,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72640475] [2020-10-14 05:42:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:31,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:31,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:31,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:31,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:31,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:33,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:42:36,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 05:42:36,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:42:36,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:36,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:36,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:36,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:36,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:36,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:42:36,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72640475] [2020-10-14 05:42:36,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:36,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:42:36,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676547031] [2020-10-14 05:42:36,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:42:36,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:42:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:42:36,711 INFO L87 Difference]: Start difference. First operand 967 states and 1156 transitions. Second operand 13 states. [2020-10-14 05:42:37,818 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-14 05:42:38,157 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-10-14 05:42:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:38,352 INFO L93 Difference]: Finished difference Result 1400 states and 1693 transitions. [2020-10-14 05:42:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:42:38,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-10-14 05:42:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:38,357 INFO L225 Difference]: With dead ends: 1400 [2020-10-14 05:42:38,357 INFO L226 Difference]: Without dead ends: 1337 [2020-10-14 05:42:38,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:42:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2020-10-14 05:42:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1069. [2020-10-14 05:42:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2020-10-14 05:42:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1296 transitions. [2020-10-14 05:42:38,575 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1296 transitions. Word has length 74 [2020-10-14 05:42:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:38,575 INFO L479 AbstractCegarLoop]: Abstraction has 1069 states and 1296 transitions. [2020-10-14 05:42:38,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:42:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1296 transitions. [2020-10-14 05:42:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:42:38,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:38,578 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:42:38,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:42:38,579 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash -535241427, now seen corresponding path program 16 times [2020-10-14 05:42:38,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:38,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951912248] [2020-10-14 05:42:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:38,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:38,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:39,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:39,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:40,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:43,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 05:42:43,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:42:43,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:44,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:44,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:44,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:44,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:44,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:44,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:44,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:44,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:44,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:44,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:42:44,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951912248] [2020-10-14 05:42:44,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:44,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:42:44,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893917154] [2020-10-14 05:42:44,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:42:44,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:42:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:42:44,195 INFO L87 Difference]: Start difference. First operand 1069 states and 1296 transitions. Second operand 13 states. [2020-10-14 05:42:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:45,467 INFO L93 Difference]: Finished difference Result 1978 states and 2440 transitions. [2020-10-14 05:42:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:42:45,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-10-14 05:42:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:45,471 INFO L225 Difference]: With dead ends: 1978 [2020-10-14 05:42:45,471 INFO L226 Difference]: Without dead ends: 1296 [2020-10-14 05:42:45,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:42:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2020-10-14 05:42:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1072. [2020-10-14 05:42:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1072 states. [2020-10-14 05:42:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1287 transitions. [2020-10-14 05:42:45,682 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1287 transitions. Word has length 74 [2020-10-14 05:42:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:45,682 INFO L479 AbstractCegarLoop]: Abstraction has 1072 states and 1287 transitions. [2020-10-14 05:42:45,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:42:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1287 transitions. [2020-10-14 05:42:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:42:45,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:45,685 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-10-14 05:42:45,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:42:45,685 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -729020431, now seen corresponding path program 17 times [2020-10-14 05:42:45,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:45,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843066289] [2020-10-14 05:42:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:45,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:45,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:46,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:46,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:47,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:47,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:48,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:50,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:50,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:42:50,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 05:42:50,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 05:42:50,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:50,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:42:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:42:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:42:50,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:50,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:50,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:50,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:50,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:50,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:50,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-14 05:42:50,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843066289] [2020-10-14 05:42:50,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:50,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:42:50,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402677796] [2020-10-14 05:42:50,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:42:50,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:42:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:42:50,900 INFO L87 Difference]: Start difference. First operand 1072 states and 1287 transitions. Second operand 10 states. [2020-10-14 05:42:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:51,776 INFO L93 Difference]: Finished difference Result 2508 states and 3042 transitions. [2020-10-14 05:42:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:42:51,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-14 05:42:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:51,783 INFO L225 Difference]: With dead ends: 2508 [2020-10-14 05:42:51,783 INFO L226 Difference]: Without dead ends: 2250 [2020-10-14 05:42:51,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:42:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-14 05:42:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 1181. [2020-10-14 05:42:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1181 states. [2020-10-14 05:42:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1411 transitions. [2020-10-14 05:42:52,009 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1411 transitions. Word has length 74 [2020-10-14 05:42:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:52,010 INFO L479 AbstractCegarLoop]: Abstraction has 1181 states and 1411 transitions. [2020-10-14 05:42:52,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:42:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1411 transitions. [2020-10-14 05:42:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 05:42:52,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:52,012 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2020-10-14 05:42:52,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:42:52,012 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2119015006, now seen corresponding path program 18 times [2020-10-14 05:42:52,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:52,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580558074] [2020-10-14 05:42:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:52,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:52,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:52,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:53,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:57,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:57,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:42:57,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 05:42:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 05:42:57,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:57,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:42:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:42:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:42:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:57,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:42:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:57,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:42:57,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:42:57,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:42:57,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:42:57,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:42:57,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:42:57,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:42:57,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:42:57,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:42:57,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:42:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-14 05:42:57,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580558074] [2020-10-14 05:42:57,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:42:57,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:42:57,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625567282] [2020-10-14 05:42:57,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:42:57,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:42:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:42:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:42:57,101 INFO L87 Difference]: Start difference. First operand 1181 states and 1411 transitions. Second operand 6 states. [2020-10-14 05:42:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:42:57,446 INFO L93 Difference]: Finished difference Result 2259 states and 2702 transitions. [2020-10-14 05:42:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:42:57,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-14 05:42:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:42:57,450 INFO L225 Difference]: With dead ends: 2259 [2020-10-14 05:42:57,450 INFO L226 Difference]: Without dead ends: 1103 [2020-10-14 05:42:57,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:42:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-10-14 05:42:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 919. [2020-10-14 05:42:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-10-14 05:42:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1046 transitions. [2020-10-14 05:42:57,627 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1046 transitions. Word has length 75 [2020-10-14 05:42:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:42:57,627 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1046 transitions. [2020-10-14 05:42:57,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:42:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1046 transitions. [2020-10-14 05:42:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 05:42:57,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:42:57,629 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2020-10-14 05:42:57,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:42:57,629 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:42:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:42:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1857535468, now seen corresponding path program 19 times [2020-10-14 05:42:57,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:42:57,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318370122] [2020-10-14 05:42:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:42:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:42:57,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:57,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:42:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking...